Basic noclip detection (high chance of false positives, only text warning atm)

TShockAPI/TShock.cs

@@ -383,6 +383,8 @@ namespace TShockAPI
                                 player.TilesDestroyed.Clear();
                             }
                         }
+                        if (CheckPlayerCollision(player.TileX, player.TileY))
+                            player.SendMessage("You are currently nocliping!", Color.Red);
                     }
                 }
             }
@@ -806,6 +808,19 @@ namespace TShockAPI
                    (player.TPlayer.statLife > 400);
         }
 
+        public static bool CheckPlayerCollision(int x, int y)
+        {
+            for (int i = x; i < x + 2; i++)
+            {
+                for (int h = y; h < y + 4; h++)
+                {
+                    if (!Main.tile[i, h].active || Main.tile[i, h].type == 2)
+                        return false;
+                }
+            }
+            return true;
+        }
+
         public void OnConfigRead(ConfigFile file)
         {
             NPC.defaultMaxSpawns = file.DefaultMaximumSpawns;